1. Heat olive oil in a large saucepan over medium heat. Add the chopped onion and sauté, until translucent, about 10 minutes. Add the garlic and sauté another 3 minutes. Add the tomatoes, oregano, red pepper flakes, and salt and pepper and bring to a gentle boil. Reduce the heat, cover, and simmer for 20 minutes. Stir in the chopped basil and remove sauce from heat.
2. Rinse the zucchini squash in cold water and chop off the tips and tails. Using a spiralizer (either hand-held or free-standing), spiralize the zucchini squash into noodles. Heat 2 tablespoons of olive oil over medium heat in a large saucepan. Add the zucchini noodles and sauté, stirring occasionally, until noodles are hot and reach desired “done-ness,” which usually takes about 3-5 minutes.
3. Serve zucchini noodles with marinara sauce. Top with freshly chopped basil,